Ch5-The Periodic Table and Periodic Law

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Across
  1. 2. ____Rule: Chemical compounds tend to form so that each atom by gaining losing or sharing electrons has an octet of electrons in its highest occupied energy level
  2. 4. A vertical column of elements in the periodic table
  3. 6. Elements that are generally lustrous malleable ductile and good conductors of heat and electricity
  4. 9. A family of highly reactive nonmetals
  5. 11. ____Radius: One half the distance between the nuclei of identical atoms that are bonded together
  6. 12. ____Table: An arrangement of elements in which the elements are separated into groups based on a set of repeating properties
  7. 15. ____Transition Elements located in the f block of the periodic table
  8. 19. A negatively charged ion
  9. 22. ____Affinity: The energy change that occurs when an electron is acquired by a neutral atom
  10. 23. ____Law: When elements are arranged in order of increasing atomic number there is a periodic repetition of their physical and chemical properties
  11. 24. ____Family: A group of elements with similar chemical properties
  12. 25. Elements with properties intermediate between those of metals and nonmetals
  13. 26. A series of radioactive elements located in the f block
  14. 27. A positively charged ion
  15. 28. Electrons available to be lost gained or shared in the formation of chemical compounds
Down
  1. 1. ____Gases:A family of elements that are generally unreactive
  2. 3. Elements characterized by the presence of d electrons
  3. 5. Elements in the main block of the periodic table
  4. 7. A family of highly reactive metals
  5. 8. ____Earth: A family of reactive metals
  6. 10. A horizontal row of elements in the periodic table
  7. 13. The ability of an atom of an element to attract electrons when the atom is in a compound
  8. 14. ____Trend: A predictable pattern in the properties of elements across a period or down a group
  9. 16. Elements that are generally poor conductors of heat and electricity
  10. 17. ____Shell: The outermost occupied energy level of an atom
  11. 18. The likelihood that an element will undergo a chemical reaction
  12. 20. The energy required to remove an electron from a gaseous atom
  13. 21. A series of rare earth elements located in the f block